it read, "two explosions at the white house and barack obama is injured." you see it there. but immediately, the a.p. sent out another tweet saying it had been hacked. however, the false information was retweeted thousands of times within minutes. the ripple effect was felt on wall street. we're going to show you a chart of the dow for the day. right in the middle of your screen, you see that dramatic drop of almost 150 points as traders reacted to the false tweet. you can see the timeline. it happened around 1:00 p.m. eastern time. but almost immediately the markets bounced back and resumed normal trading. >>> new tonight at 6:00, stay focused on immigration reform. a former cabinet members and governors meeting on the peninsula today. they're members of the bipartisan policy center's immigration task force. condoleeza rice is among them. the current stanford university professor shared some of her priorities. one of them making sure that highly skilled people have a way to stay and work in places like silicon valley. >> obviously, when you have a statistic out of that duke